﻿using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Collections;
using System.Collections.Generic;
using System.Linq;


namespace SMSHelper
{
    public static class Extension
    {
        public static bool IsNull(this IEnumerable<object> source)
        {
            if (source == null) return true;
            if (source.FirstOrDefault() == null) return true;
            return false;
        }

        public static bool IsNotNull(this IEnumerable<object> source)
        {
            return !source.IsNull();
        }

    }
}
